Overview As a senior DevOps Engineer, you will  own  the AWS infrastructure and DevOps toolchain for a high-scale ad serving system composed of asynchronous  Java microservices (Akka framework) .

Targets include  <50ms  response time and  up to 5M concurrent users  with  99.99% uptime .

Responsibilities Design & stand up AWS  environments end-to-end (landing zone, VPCs, networking, security, automation).

Build  immutable infrastructure  and  CI/CD  for Java microservices (Maven/Gradle) including blue/green & canary releases and automated rollbacks.

Implement  observability : metrics, logs, traces, SLOs/SLIs, alerting, on-call runbooks.

Engineer  reliability & performance : autoscaling, caching layers, multi-AZ/region DR, capacity planning to support 5M+ concurrent users and p95/p99 latency goals.

Establish  security-by-design : IAM least priv...